LLN_calculator_guisan

Introduction

A simple calculator with guisan and LL grammar.

Runtime requirements

• SDL 2.0+
• SDL2_image
• SDL2_ttf
• SDL2_mixer
• Guisan(built-in)

LL Grammar

Raw Grammar:

E-->E+T|E-T|T
T-->N*T|N/T|N
N-->M^N|M
M-->(E)
   |sin(E)
   |cos(E)
   |ln(E)
   |lg(E)
   |sqrt(E)
   |tan(E)
   |number

Eliminate the left recursion:

E-->Te
e-->+Te|-Te|void
T-->Nt
t-->*Nt|/Nt|void
N-->Mn
n-->^N|void
M-->(E)
   |sin(E)
   |cos(E)
   |ln(E)
   |lg(E)
   |sqrt(E)
   |tan(E)
   |number